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Old 11-17-2012, 07:58 AM   #1
chinabenjamin66
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How to detect DHCP server in a LAN under a Ubuntu linux client


Hello friends

As I remember, there is tool called dhcpd-test in Suse Linux, it can detect the DHCP server in LAN, but I don't know what it is under Ubuntu. Can anyone tell me there are some tools can be used for detecting DHCP server in LAN under Ubuntu?
 
Old 11-17-2012, 08:28 AM   #2
freelinuxtutorials
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one way is to use sniffer tool such as tcpdump or wireshark, then send a DHCP request.
 
Old 11-17-2012, 10:37 AM   #3
agentsteel
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use a network tool such as nmap

for example :
# nmap 192.168.1.0/16 -p 53

(port 53 is dns)
 
Old 11-17-2012, 11:05 PM   #4
catkin
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Do you want to find out the IP address of the DHCP server that granted your computer a lease or do you want to scan the network for DHCP servers?
 
Old 11-18-2012, 01:35 AM   #5
chinabenjamin66
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Quote:
Originally Posted by catkin View Post
Do you want to find out the IP address of the DHCP server that granted your computer a lease or do you want to scan the network for DHCP servers?

Hi catkin,

That is what I want to know , do you know some similar tool like dhcpd-test under Ubuntu? so I can detect how many dhcp server working in the LAN.

Last edited by chinabenjamin66; 11-18-2012 at 01:43 AM.
 
Old 11-18-2012, 02:55 AM   #6
catkin
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There's a solution at http://www.unix.com/ip-networking/17...-discover.html
 
  


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